Fig. 1
From: Enhancement of microalgal CO2 fixation in photobioreactors by means of spiral flow vortices
Schematic of column PBR and installation of portable conical helix baffles in central column sections. A Five round-shaped baffles connected with a supporting rod in vertical position. Three different shapes of helix: flat, round, and inclined, and their respective flow vortices represented in the side small boxes. Red-dotted arrows represent upward flow, blue-dotted arrows represent downward flow of the medium. B Three-dimensional printed 3 types of portable conical helix baffles, their vertical arrangement and installation in lab-scale column PBRs. (For elucidation regarding the color references in this figure legend, readers are directed to consult the online version of this article.)